The correct response is: the presence of starch.
Iodine is a well-known indicator for starch; when iodine solution is added to a substance containing starch, it will turn a blue-black color.
A scientist adds iodine as an indicator to an unknown substance. What will this indicator reveal about the substance?(1 point)
Responses
the presence of starch
the presence of starch
the presence of baking powder
the presence of baking powder
the presence of glucose
the presence of glucose
the presence of lipids or fat
7 answers
A student wants to try to convince her parents to stop serving peas for dinner. She lays out her argument that peas are high in fructose, which is a type of sugar. Which test could she use to provide scientific evidence to support her argument that peas are high in fructose?(1 point)
Responses
Benedict’s test
Benedict’s test
iodine test
iodine test
vinegar test
vinegar test
brown paper bag test
Responses
Benedict’s test
Benedict’s test
iodine test
iodine test
vinegar test
vinegar test
brown paper bag test
The correct response is: Benedict’s test.
Benedict’s test is used to detect the presence of reducing sugars, such as fructose. If the peas contain fructose, the student could use this test to provide scientific evidence for her argument.
The expression like a ton of bricks means “a crushing weight.” Would being hit by an actual ton of bricks hurt if it happened on the moon?(1 point)
Responses
Yes, it would hurt because the bricks would still have more weight.
Yes, it would hurt because the bricks would still have more weight.
No, it would not hurt because the bricks would have little mass.
No, it would not hurt because the bricks would have little mass.
No, it would not hurt because the bricks would have more weight.
No, it would not hurt because the bricks would have more weight.
Yes, it would hurt because the bricks would still have the same mass.
Yes, it would hurt because the bricks would still have the same mass.
Responses
Yes, it would hurt because the bricks would still have more weight.
Yes, it would hurt because the bricks would still have more weight.
No, it would not hurt because the bricks would have little mass.
No, it would not hurt because the bricks would have little mass.
No, it would not hurt because the bricks would have more weight.
No, it would not hurt because the bricks would have more weight.
Yes, it would hurt because the bricks would still have the same mass.
Yes, it would hurt because the bricks would still have the same mass.
The correct response is: Yes, it would hurt because the bricks would still have the same mass.
While the weight of the bricks would be less on the moon due to lower gravity (about 1/6th of Earth's), their mass remains unchanged. If you were hit by an object with significant mass, it would still cause harm, regardless of the gravitational forces at play.
What happens to the density of a material if you have a larger piece of it?(1 point)
Responses
The density will remain the same because mass and volume will both increase in the same way.
The density will remain the same because mass and volume will both increase in the same way.
The density will be smaller because the mass remains the same as the volume increases.
The density will be smaller because the mass remains the same as the volume increases.
The density will be greater because the mass increases but the volume remains the same.
The density will be greater because the mass increases but the volume remains the same.
The density will remain the same because mass and volume will remain the same.
Responses
The density will remain the same because mass and volume will both increase in the same way.
The density will remain the same because mass and volume will both increase in the same way.
The density will be smaller because the mass remains the same as the volume increases.
The density will be smaller because the mass remains the same as the volume increases.
The density will be greater because the mass increases but the volume remains the same.
The density will be greater because the mass increases but the volume remains the same.
The density will remain the same because mass and volume will remain the same.
The correct response is: The density will remain the same because mass and volume will both increase in the same way.
Density is defined as mass per unit volume (density = mass/volume). If you have a larger piece of a material, both the mass and the volume will increase proportionally, so the density will remain constant.